Kernel: Convert the rte-local attributes to extended attributes and flags to pflags

nest/route.h

@@ -250,13 +250,6 @@ typedef struct rte {
       s8 stale;				/* Route is LLGR_STALE, -1 if unknown */
     } bgp;
 #endif
-    struct {				/* Routes generated by krt sync (both temporary and inherited ones) */
-      s8 src;				/* Alleged route source (see krt.h) */
-      u8 proto;				/* Kernel source protocol ID */
-      u8 seen;				/* Seen during last scan */
-      u8 best;				/* Best route in network, propagated to core */
-      u32 metric;			/* Kernel metric */
-    } krt;
   } u;
 } rte;